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United States Patent | 6,106,142 |
Rockstedt | August 22, 2000 |
The invention relates to a multiscrew, continuous mixing machine for plasticizable compounds with two screws, which rotate in the same direction in a housing and which penetrate the cylindrical part of the housing that envelopes the screws. The screws include axially spaced apart conveying sections and at least one mixing section therebetween. The conveying sections are formed by intermeshing conveying screws. The mixing section is formed by mixing elements. The mixing elements are followed by restricting elements which include short screw elements with back feed thread. The back feed thread forms a vertex, which progresses radially shortened along a thread in such a way that the radius of the vertex is shorter on the inlet side than on the outlet side and inbetween increases continuously towards the outlet side.
Inventors: | Rockstedt; Siegward (Bad Neuenahr-Ahrweiler, DE) |
Assignee: | Compex GmbH Compundier-und Extrusionsanlagen (DE) |
Appl. No.: | 091019 |
Filed: | June 8, 1998 |
PCT Filed: | October 2, 1997 |
PCT NO: | PCT/EP97/05447 |
371 Date: | June 8, 1998 |
102(e) Date: | June 8, 1998 |
PCT PUB.NO.: | WO98/15400 |
PCT PUB. Date: | April 16, 1998 |
Oct 07, 1996[DE] | 196 41 235 |
Current U.S. Class: | 366/85; 366/88; 366/90 |
Intern'l Class: | B29B 007/48 |
Field of Search: | 366/79,81,83-85,88-90,297,300,301,321,323,324 425/204,208,209 |
3608868 | Sep., 1971 | Koch | 366/85. |
3983862 | Oct., 1976 | Spriet | 366/301. |
4541270 | Sep., 1985 | Hanslik. | |
4600311 | Jul., 1986 | Mourrier et al. | 366/90. |
5267788 | Dec., 1993 | Rockstedt | 366/85. |
5318358 | Jun., 1994 | Wobbe et al. | 425/208. |
5499870 | Mar., 1996 | Rockstedt | 425/204. |